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The sine of an angle is the name of the ratio of the length of the opposite side to the length of the hypotenuse. This is a number between 1 and +1. That's all! 

Why Vectors?  Go ahead click and play! 

Vectors have length and are directional. They are arrows. Many problems in physics will utilize these arrows. We will use trig to add and subtract these arrows. 

What are unit vectors? 




You
can add as many vectors together as you wish. All you have to do is put
them together in any fashion 'headtotail' 

When
you want to subtract two vectors simply reverse the vector to be subtracted
then add them 'headtotail. 

Everthing
you wanted to know about Trigonometry and Vector Analysis 

FreeFall 
